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鳜塘浮游生物DNA序列多样性、水质和疾病的关系

王亚军1,2;吴淑勤1;林文辉1;杨智慧1;吴会民1;石存斌1;潘厚军1   

  1. 1中国水产科学研究院珠江水产研究所, 广州 510380;
    2上海水产大学生命科学与技术学院, 上海 200090
  • 收稿日期:2005-12-30 修回日期:2006-10-31 出版日期:2007-01-18 发布日期:2007-01-18

Relationships among planktons DNA sequence diversity, water quality and fish diseases in Siniperca chuatsi ponds

WANG Ya-jun1,2;WU Shu-qin1;LIN Wen-hui1;YANG Zhi-hui1;WU Hui-min1;SHI Cun-bin1;PAN Hou-jun1   

  1. 1Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380,
    China;
    2College of Aqua-life Science and Technology, Shanghai Fisheries University, Shanghai 20090,
    China
  • Received:2005-12-30 Revised:2006-10-31 Online:2007-01-18 Published:2007-01-18

摘要: 应用RAPD技术研究了鳜塘水生生态系统中浮游生物群落α-多样性,分析了浮游生物群落DNA序列丰富度与水质和疾病发生之间的关系,探讨了池塘养殖密度和短周期、小密度、高投饵量养殖方式对浮游生物群落DNA序列丰富度及水质的影响.结果表明:1)鳜塘浮游生物群落DNA序列丰富度与水质综合指数呈显著负相关关系(P<0.01); 2)池塘高密度养殖会造成浮游生物丰富度降低和水质综合指数升高;3)短周期、小密度、高投饵量的养殖模式对环境的损伤较大;4)浮游生物群落DNA指纹01矩阵和水质理化因子样品聚类分析表明,发病塘在水质理化因子和浮游生物群落上具有相似性,为鳜疾病预报模型的建立奠定了基础.

关键词: 太湖地区, 稻季, 养分淋洗

Abstract: By using random amplified polymorphic DNA (RAPD) technique, this paper studied the α-diversity of plankton communities and its relationships with water quality and fish diseases in 7 Siniperca chuatsi ponds, as well as the effects of stocking density and a new culture model on the diversity and water quality. The results showed that there was a significant negative correlation between the DNA sequence diversity of plankton communities and water quality index, and high stocking density decreased the DNA sequence diversity and increased the water quality index. The new culture model with short culture period, low stocking density and high feeding stuff input had a greater damage on the water environment. Hierarchical cluster analysis indicated that there existed similarities in the DNA sequences of plankton communities and the physicochemical properties of water bodies in the ponds with fish diseases, which provided a possibility to predict the diseases occurrence in Siniperca chuatsi ponds.

Key words: Nutrient leaching, Paddy field, Taihu Lake area